The Round Tower
A 17th-century observatory tower with a spiral ramp and views over the old town.
About
Why visit The Round Tower
Rundetaarn was built by Christian IV in the 1640s as an astronomical observatory, and it is still Europe's oldest functioning one. Instead of stairs, a wide spiral ramp winds to the top, passing a library hall used for exhibitions.
Not to miss
Highlights
The moments that define a visit to The Round Tower.
Spiral ramp
An unusual cobbled walkway rather than steps.
Rooftop platform
Views over Copenhagen's red roofs and spires.
Library Hall
A historic hall with changing exhibitions.
Local know-how
Visitor tips
Small things that turn a good visit into a great one.
Great for families — the ramp is an easy climb.
Combine with the lanes of the Latin Quarter.
Nearby
Combine with
Other guides within a short walk.
Rosenborg Castle
A Renaissance royal castle in the King's Garden that guards the Danish crown jewels.
Open guideBotanical Garden & Palm House
A peaceful garden with a 19th-century glass Palm House, lakes and thousands of plant species.
Open guideChristiansborg Palace
Seat of the Danish Parliament, with royal reception rooms, ruins and a free tower viewpoint.
Open guide